Ron L. Graham is sadly no longer with us. He was very prolific and his work spanned many areas of mathematics including graph theory, computational geometry, Ramsey theory, and quasi-randomness. His long association with Paul Erdős is of course very well known. Graham’s number, and Graham-Rothchi...
Hilbert spaces, including projections, unitary operators, and self-adjoint operators. ... Definition 8.1 A projection on a linear space X is a linear map P : X → X such ... subspace of a Hilbert space H. For any vector u ∈ H with u = 1, the map Pu ... Thus, every bounded linear functional is give...
mathoverflow.net
Any user with at least 15 reputation points should flag the post as spam. After 6 spam flags, the post is deleted. In addition to being deleted, even for users who can see the deleted posts, the content of the post is hidden - although they can still access the revision history. The same thing ha...
John Conway passed away on April 11, 2020, at age 82: https://en.wikipedia.org/wiki/John_Horton_Conway
« first day (2571 days earlier) ← previous day next day → last day (1354 days later) »